Balancing mechanism



2 Sheets-Sheet l w. R. MITTENDORF BALANCING MECHANISM Filed Deo. 15,

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June 17, 1930.

June 17,1930. w. R. MITTENDORF BALANCING MECHANISM Filed Dc. l5, 1922 2 Sheets-Sheet 2 gnomo@ Patented June 17, 1930 UNITEDv STATES PATE'EI FFICE WILLIAM R. MITTENDORF, OF CINCINNATI, OHIO, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO INTERNATIONAL BUSINESS MACHINES CORPORATION, OF NEW YORK,

N. Y., A CORPORATION 0F NEW YORK BALANCING MECHANISM Application filed December 15, 1922. Serial No. 607,207.

rlhis invention relates to balancing mechanism, such as computing scales, and more particularly to such a computing scale designed to count duplicate parts or articles.

One object of the invention is to provide an automatic computing balancing mechanism in which the value of the unit of computation may vbe varied by 'varying the multiplication of leverage in such a manner that the responsiveness of the mechanismy will not be disturbed by the operation of changing the leverage, thereby enabling the indicating elements to be used as a gauge for establishing the value of the unit.

A further object of the invention is to provide a balancing mechanism in which the multiplication of the leverage may be varied by changing the relative position of the axis of a lever in said mechanism.

A further object of the invention is to provide such a mechanism with means for holding the lever positively against longitudinal movement without interfering with the free movement of the lever about axis.

A further object of the invention is to provide such a mechanism With automatic counterbalancing means to compensate for changes in the initial load and in the distribution of the metal in the lever due to the change in the position of the axis fith relation to the lever so that the zero balance of the lever will not be affected by the change in the relative position of the axis.

A further object of the invent-ion is to provide such a mechanism which Will be simple in construction, positive in its operation and easily manipulated.

Other objects of the invention will appear as the mechanism is descibed in detail.

In the accompanying drawings Fig. l is a side elevation of a balancing mechanism embodying my invention, with the casino' partly in section; F ig. 2 is a plan view of such a mechanisn'l; Fig. 3 is a section taken on line 3 3 of Fig. 2; Fig. 4 is a section taken on the line 4--4 of Fig. 3; Fig. 5 is a detail view of the locking device for one of the tension devices for the ex'ible connecting members; Fig. 6 is an end elevation of the lever showing the connections between the same and the counterbalancing spring and the indicator; and Fig. 7 is a section taken on the line 7-7 of Fig. l.

In these drawings I have illustrated one embodiment of my invention and have shown the same as embodied in a scale comprising a single lever of the first principle Which is provided on one side of its axis with a load receptacle, r pan, and on the other side thereof with a counterbalance. It Will be understood, houf'ever, that the invention may take various forms and may be applied to scales or balancing mechanisms of various kinds.

In the form here illustrated the mechanism comprises a supporting structure consisting of a standard l mounted on a base 2 and having at its upper end an elongated head or platform 3. A single lever 4, of thc first order, is mounted upon the supporting structure, the le ver and the supporting structure being provided with cooperating pivot members about the axis of which the lever moves. One of these pivot members is movable relatively to the lever to shift the axis about which the lever moves. In the present construction, the lever is provided With an elongated bearing having a fiat bearing surface which rests upon a pivot member adjustably mounted upon the heat or platform 3 of the supporting structure. The lever, as here shown, is provided between its ends With a yolre shaped portion consistinff of parallel side members 5 each of which is provided at its lower side with a recess 6 in which is mounted bearing. The bearing may be of any suitable character but is here shown as an elongated slab of agate having its lower sui-'face perfectly flat, and when the lever is in its zero balanced position, in horizontal plane. The pivot members upon which the bearing rests are here shown as knife edge or tapered pivot blocks 8. These pivot members may be provided with sharp knife edges if desired, but this is not necessary as the device Will function satisfactorily upon a dull pivot member.

The lever 4, which is thus pivotally mounted on a transverse axis arranged betiveen its ends, has connected therewith, at one end thereof, a load receptacle or pan 9 Which is supported from a yoke 10 having hook shaped portions 11 engaging knife edge pivots 12 on the end of the lever. The other end of the lever is provided With a counterbalance which may be of any suitable character but, in the present instance, consists of a spring 13 which is connected With the lever by means of hook shaped members 14 engaging over knife edge pivot points 15 carried by the lever. Also connected with the last mentioned end of the lever is an indicator to indicate the computation which has been effected by this balancing mechanism. This result or computation may be expressed by any suitable means, but as here shoivn, I have utilized an indicating device and the particular device here shown, comprises a disk or dial 16 having on its face three series of graduat-ions for indicating the number of units on the load receptacle, the second series having twice the number of graduations that the firstseries has, and the third series having twice the number of divisions that the second series has. If desired, a fourth series of graduations may be provided for indicating rveight in pounds and ounces. This dial rotates about a central axis 17 in such a manner that all four series of graduations are carried past a lixed reading line or Wire 18. The dial may be operatively connected With the lever in any suitable manner but, as here shown, it is provided with a pinion 19 with which meshes a toothed rack Q0 which is pivotally connected With the lever. The point of connecrion of the rack with the lever is preferably coincident ivith the axis upon which the counterbalance is connected with the lever so that there Will be no variation between the movement of the counterl alance and the indicator. This is accomplished in the present instance, by securing the rack to a yoke shaped member 21 having bearing openings Whicn receive pivot pins 22 carried by a second yoke shaped member 23 rigidly secured to the lever with the pivot pins 22 in alinement y'ith the pivot pins 15.

In utilizing the apparatus as a counting scale a single unit, or article, of the kind to be counted, is placed in the load receptacle and this moves the indicator a distance corresponding to the Weight of the unit. ln order that the count may be accurately computed on the indicator it is necessary that the first graduation of some one of the several series of counting graduations en the indicator should register with the reading line when the single unit is on the load receptacle. TWhen the first graduation of one series does register Vith the reading line it Will be apparent that the indicator ivill be moved the distance of one graduation for each additional article of like kind which is placed on the load receptacle, and therefore, that when a mass of articles has been placed in the load receptacle the indication on the particular series of graduations on which the computation is l eing made will indicate the exact number of articles in the load receptacle. rlhe chart, hovfever, has but a limited number, in the present instance three, series of counting graduations a d the unit or articles to be counted may be of any Weight Within the difference in capacity betvreen one graduation of the coarse series and one graduation of the line series and consequently it very often happens that the Weight of the single unit on the load receptacle Will not cause the ii graduation of any series of graduat-ions to register with the reading line. In order to bring about this registration I propose to change 'the multiplication of the lever by shifting the axis about which the lever moves, and as has been stated the pivot members S of the present device, are movable lengthwise of the lever, these pivot members having slit ing Contact vfith the flat bearing surface of the lever. As here shown the pivot members or fulcrums S are mounted on a carriage 2st- Which is slidably mounted on. the head or platform 3 of the supporting strueture. These pivot blocks or fulerums may be mounted on the carriage in any desirer'l manner but the present carriage is provided with upright side walls 25 in Which is mounted a shaft 26 the end portions of which extend beyond the Walls 25 and form supports for the pivot blocks, which are mounted on the ends thereof and are held rigidly against rotation by pins 27 which extend through the same and into the Walls 25 of the carriage. Various mechanism may be provided for moving the cari'afe, on the supporting structure and thus adjusting the pivot block with relation to the lever so as to change the pivot point or axis of the lever. In the present mechanism the carriage comprises transverse members or flanges 2S having openings in which is mounted a rod 29. 'lhis rod is rotatable in the openin in the carriage and is held a, {'ainst long dinal movement in one direction with relation to the carriage by a collar 30 rigidly secured to the rod and bearing on the outer c de of one of the flan es or parts 2S of the carriage. A spring 31 confined betiveen the inner side of the same part QS and a second also rigidly secured to the rod.A

collar o* holds the part 28 in firm Contact vvith the collar 80, but the Contact between these parts is of a yielding character so that there will be no binding betvveen the parts which might interfere With the free rotation of the rod. The rod is provided with a threaded portion 33 mounted in a fixed nut 3-l carried bv the head 3 of the supporting structure and the outer end of the rod is provided with a isn very satisfactory, because it is positive and is highly sensitive to the movement of the lever. The device for so holding the lever consists, in the present insta ce7 of a member rotatably mounted on the supporting structure and having a curved periphera surface. The axis ot the rotatable member is spaced from the afl-is of the lever a distance equal to the radius of the rotatable member and is preferably arranged directly below the axis of the lever. Connected with the rotatable member and extending about the curved surface thereof is a flexible device which may consist of one part or oit a plural ity ot pa Is, and vthe end portions ot which extend tangently from said rotatable meniber in opposite directions, lengthwise oi the lever, and are connected with the lever at points spaced from the axis thereof. rlhe point or points of, tangential Contact between the lie'xible 1l vice and the curved surface of th. i einher are coincident with the device, such as a knob 35, for rotating tl e same. The nut 84: beingr fixed the re ion of the screw therein will impart lengt iwise movement to the rod and the rod being held against movement relative to the carriage the latter will be moved with the rod. The amount oit movement imparted to the carriage may be determined in `table manner and I have shown the auch as provided on its periphery with a series graduations. Cooperating witl tl e, nations is a plate 3G sec n'cd to the sin" f ing structure and arranged parallel u rod 29 and having its edge adjacent to the periphery 01' the knob no. The pl" 1 also graduated, the graduations on being in units of one hundred and t.vr nations on the knob being 'in units and extending from one to one The right hand edge of the knob indicator for the graduations on tl and the upper edge ot the platl dicator'for the graduations ou i' pitch of the screw is such tml rotation of the knob will to move the distance of one the plate 36. Consequently, by graduations on the plate and th i the knob the exact position oi the lever c. be determined in figures. For e, i the right hand edge of the knob ters exactly w'th the tive hundred gf' c ation on the plate and the screw is ro one quarter of a turn to the left, the igu on the knob would be brought inA tration with the upper edge et the pl the reading on the plate would be Q00 ai on the knob 35 which would be taken as position 475 for the axis of the lever. 'Vh the position ot he axis has been deter for a given article or unit of computati the scale can be quickly adjusted for ag weighing or counting such articles by adjusting the knob to the desired number.

It is, of course, necessary to the determination and maintenance of the correct multiplication of leverage that the lever shall be held against longitudinal movement. This is usually accomplished by the use of a V-bearing but, in the present apparat/ns, l am employing a flat bearing to permit of the fulcrum being moved along the same. It is also necessary that the lever sliiould be held against lengthwise movement in a manner which will not interfere with its free pivotal movement about its axis because the lever must be free to move about its in order that it may move under the inlluence oit' the unit in the load receptacle to actuate the indicator and thus inform the operator 'wh the proper adjustment of the axis has been secured, Vhile this may be aecomjfim ed in various Ways I have in the present e awjfosite ings, illustrated one method of holding the lever tend to hold the same against twisting lever against lengthwise movement which movement. In the presentdevice, in which same as cons ing` ot an intermediate memi ber 37 carried by the supporting structure arranged adjacent to the axis of the if an on the opposite sides of the i- LNte member 3'? and extending lengt iwise of the lever are flexible connectino neinbers, here shown as thin metal tapes 38 and 89, there being, in the present instance, two of these tapes on each side of the intermediate memb The tapes on both sides oi th ern.u te member are connected at their inner ends therewith and at their outer ends with the lever. Various means may be provided 'for connecting the outer ends of the lleible members or tapes with the lever but the connection is preferably an adjustable one so that the tapes may be drawn tant and maintained in that condition. To this end l have connected the outer end of each with the periphery off a disk or button l0 carried by a stud shaft ll which is rot ly mounted .in the lever. Coopcratin with the stud sha't't of the disk is a locking screw @l2 by which the disk may be locked in adjusted positions. The points et' contact between the inner ents of the flexible members, 38 and 39, and the intermediate member 37 are subs `ntial alinementwith the axis of the lever and conse- Quently when the lever moves about its axis the tapes will move about their points of Contact with the intermediate member with- ,ir length and wit en l Oel

tive connecd the lerer nos 'wenn Win againsi lengitudina ispiaccme Furtherj the flexible members boire; allai 'red on opot the longitudinal center of the n members on one side thereo to be taken nj,

the axis or intermediate member with xed parts ot the supporting structure and to this end l have provided additional flexible members, i3 and l-s-, arranged on the opposite sides ot the intermediate member and connected their inner ends therewith and connected at their outer ends with disls or buttons mounted on brackets 46, 'forming part of the supporting structure, in the same manner tha the buttons Ll() are mounted on the lever. will be apparent that with this construction the intermediate member will be caused to rotate about its axis when the carriage is shifted and this rotation ot the interine Y member will cause the liexible connect or wound about the intermediate member while the flexible connecting men `eers on t other side thereoic will be paid out or unwound from the intermediate member to an amount exactly equal to the anioum that the rst mentioned flexible member are tal-Ien up. rlfhus all the iiexible members are maintained taut during the adjustment of the axis and the lever is free at all times to move about its axis, but is very positively held against longitudinal movement. Preferably some means are provided to prevent the lever from being lifted upwardly in such a manner as to impose a strain upon the flexible connecting members and, in the present device, l have shown the two arms 5 of the lever as having bars or guards 65 extendine across the bottoms of the recesses 6 beneath the lower ends ot the pivot blocks 8. rEhe guards are out ot contact with the pivot blocks but are arranged suiliciently close thereto to prevent any material vertical movement being imparted to the lever.

The balancing mechanism is, oi course, always under initial load, which is composed ot the weight ot the load receptacle and the force ot the counterbalance theretor. Obviously any shitting of the axis with relation to the lever will disturb the balance of the initial load and throw the lever out et Zero balance, or out of seal. Liltevff-w t shifting ot the axis with relation to the leve" changes the distribution of the metal in the lever with relation to its axis and this tends to throw the lever out or" zero balace or seal. t is thereiore desirable that s ie means be provided for maintaining the er in Zero balance during the adjus i c axis. ln the present construction I hav provided means for automatically7 adjusting the counterbalance according to the adjustment of the axis thus maintaining the lever in Zero balance. The automatic adjustment ot the counterbalance for maintaining the zero balance of the lever, at any position ot' the axis, must be accomplished in such a way that such adjustment will not interfere with the action ot' the counterbalance for the load to be weighed. Preferably the same counterbalance is used for both counterbalancing functions, part of its action being used to siaintain the zero balance of the lever and art for counterbalancing the load to be 'eig-led. It will be obvious that counteralancc of various linds may be used in connect on with the lever and that there will necessarily be more or less variation in the method of adjusting the same. In the present mechanism, where I have for the purpose of illustration employed a spring counterbalance, I have connected the adjusting device with th t end of the spring opposite the end which is connect-ed with the lever. Durin the normal operation of the lever "i' device forms al xed point of the spring and the spring operates on the lever in the same manner as if the a dj using device were a rigid connection. 51' g' device acts upon this end of g' to vary the tension thereof in tion to the amount oi movement im- L to the axis of the lever. If the axis is shifted toward the right in Fig. l the tension ot the spring is increased. If the axis is shifted to the lett in Fig. l the tension ot the spring is relieved. rlhis regulation of the tension ot the counterbalancing spring is preferably accomplished automatically and controlled directly by the movementof the axis. The adjustment of the counterbalance may be accomplished in various ways but, in the presentinstance, I have nounted in the lower end of the counterbalancing spring, a nut or block fl having a screw threaded aperture in which is mounted a rod t having a goese neel: 49 which carries a. pivot point 50. The pivot point 50 is seated in a bearing recess in a pin 5l extending between the two arms of a lever 52 which is pivoted at one end in brackcts 53 carried by the base 2. At its opposite end the lever is provided with a bearing member', such as a roller -l, which engages the edge ol a cam 55 pivotally mounted at 5G on brackets 57 mounted on the base 2. This cam is provided with an upwardly extending arm 58 which is connected with the adjustable pivotmember, preferably through the medium of the rod 29, by means ot' which the fulcrum is adjusted. As here shown a link 59 is pivotally connected with the upper end of the arm 58 of the cam and is provided in its end with a seat 60 to receive a pivot point Gl projecting from the adjacent end oi the rod 29. The action of the spring 13 were on the cam will hold the link 59 firmly in contact with the pivot point 61 but will permit the link to have free movement with relation to the rod, thereby compensating for any variations in the relative positions of the arm 58 and the rod 29. The cam surthc cam plate is so shaped that ypart to the lever 52 the movcn necessary to so regulate the tension on the sprinfv .l-l that the lever would be acci'lrately baliv Vd in all positions cf its axis with relation thereto. Preferably the lever is provided with a dash pot G2, any ordinary type, to check the vibrationrthereof.

If desired the balancing mechanism may also be provided with a tare beam yand poise for the purpose of compensating for the weight of any receptacle which may he placed upon the load receptacle 9. As shown in Figs. l and 2, a tare beam is connected with the lever 4, on opposite sides of its axis and has moutned thereon a tare poise 67 which may be adjusted for this purpose.

The operation of the mechanism will. be readily understood from thc fore;D .if description of the several parts ther-coi` and it will be apparent that I have provided a balancing mechanism which may be used in automatic scales of various kinds and in which the multiplication of the leverage of the mechanism may be controlled by shift D the axis of a lever with relation to that lever and that the lever may be held positively against lengthwise movement without in any way interfering with its free movement about its axis and that the balance or seal of the mechanism will be automatically maintained in all positions of the axis with relation to the lever.

It vwill also be apparent that the mechanism may be used for weighing the load and that the anis may be adjusted to some one position in which the standard weight on the load eceptacle will cause the corresponding standard weight to be indicated on the inner or weighing series of indications on the dial. In the present mechanism tl nis position of the axis is position 500, which is the position shown in the drawing. lVhen the axis has been adjusted to a position other than the position 500 for the purpose of counting the number of articles on the load receptacle and it is also desired to ascertain the weight of the mass of articles this is accomplished by first determining,r the count and then shifting the axis to position 50() in which position the weight indications on the dial vill register the weight of the load.

lVliile I have shown and described one embodiment of my invention I wish it to be understood that I do not desire to be limited to the details thereof as various modilicati ons may occur to one skilled in the art.

ylflaving now fully described my invention what I claim as new and desire tosecure by Letters Patent, is:

1. In a balancing mechanism, a supporting structure, a load supporting lever having an elongated pivot bearing, a pivot member mounted on said supporting structure adjustable along said pivot bearing and forming the sole support for said lever, and means to hold said lever against lengthwise movement relative to said supporting structure.

In a balancing mechanism, a supporting structure, a carriage mounted on said supporting structure, a pivot member mounted on said carriage, a load supporting lever having an elongated pivoted bearing resting upon said pivot member and capable of free pivotal movement thereon, and means for adjusting said carriage to move said pivot member along said pivot bearing.

3. In a balancing mechanism, a supporting structure, a carriage mounted on said supporting structure, a pivot member mounten on said carriage, a load supporting lever having an elongated pivot bearing esting upon said pivot member, means for adj sting said carriage to move said pivot member along said pivot bearing, and means for holding said lever against lengthwise movement relative to said supporting structure without interfering with its free pivotal movement on said pivot member.

4l. In a balancing mechanism, a supporting structure, a load supporting lever, a pivot member carried by one of said parts, a bearing for said pivot member carried by the other of said parts, said bearing having a flat bearing surface, and means to hold said lever against lengthwise movement relative to said supporting structure.

5. In a balancing mechanism, a supporting structure, a lead supporting lever, a knife edge pivot member carried by one of said parts, a bearing for said pivot member carried by the other of said parts, said bearing having a iiat bearing surface, and means to hold said lever against lengthwise movement relative to said supporting structure.

G. In a balancing mechanism, a supporting structure, a lever, cooperating pivot members carried by said structure and said lever, respectively, and serving to support said lever on said structure, and means associated with one of said pivot members to hold said lever against lengthwise movement.

7. In a balancing mechanism, a supportstructure, a lever, cooperating pivot members carried by said structure and said lever, respectively, and serving to support said lever on said structure, means to adjust one of said pivot members relatively to said lever, and means associated "with one of said pivot members to hold said lever against lengthwise movement.

S. ln a balancing mechanism, a supporting structure, a lever, cooperating pivot members carried by said structure and said lever, respectively, and serving to support said lever on said structure, means to adjust one ot said pivot members relatively to said lever, and means associated with the other ot said pivot members to hold said lever against lengthwise movement.

9. In a balancing mechanism, a supporting structure, apivot member carried by said structure, a lever, a pivot member carried by said lever and cooperating with the first mentioned pivot member to support said lever on said structure, and a flexible device connected with said structure at a point coincident with the axis ot said lever and connected with said lever on opposite sides ot said axis.

10. In a balancing mechanism, a supporting structure, a pivot member carried by said structure, a lever. a pivot member carried by said lever and cooperating with the lirst mentioned pivot member to support said lever on said structure, a member rotatably mounted on said structure and having a curved surface, and a flexible device connected with said rotatable member and extending tangently from the curved surtace thereof at a point in line with the axis ot said lever, said tlexible device being connected with said lever on opposite sides ot said axis.

11. ln a balancing mechanism, a supporting structure, a pivot member carried by said structure, a lever, a pivot member carried by said lever and cooperating with the first mentioned pivot member to support said lever on said structure, a cylindrical member rotatably mounted on said structure on an axis spaced trom the axis ot said lever a distance equal to the radius ot said cylindrical member, and a flexible device connected with sait. cylindrical member, ex tending tangently therefrom at a point coincident with the axis of said lever and connected with said lever on opposite ides ot the axis thereof.

12. In a balancing mechanism, a. supporting structure, a lever, a pivot member carried by one ot said parts, a bearing tor said pivot member carried by the other ot said parts, said bearing having a llat bearing surifa e, and flexible members connecting said lever with said supporting` structure and arranged to hold said lever against lengthwise movement without interfering with its pivotal movement.

13. ln a balancing mechanism, a supportmg structure, a lever, pivot member carried by one ot said parts, a bearing for said pivot member carried by the other et said parts, said bearing having a dat bearing surface, a part carried by sait supporting structure and arranged adjacent to said pivot member, and flexible members con necting the last mentioned part with said lever on opposite sides ot said pivot member.

141. In a balancing mechanism, a supporting structure, a lever, a pivot member carried by one ot said parts, a bearing 'for said pivot member carried by the other ot said parts, said bearing` havin a flat bearing surface, a normally stationary part carried by said supporting structure, flexible members connected *ith d extending in opposite directions from the last mentioned part and each connected with said lever, the points of contact between said flexible members and said part being in substantial alinement with the axis oli' said lever.

15. ln a balancing mechanism, a supportng structure, a lever mounted on said strucure for movement about a transverse axis, sans tor adjusting said axis lengthwise of .aid lever, and a connection between said upporting structure and said lever comprisflexible members to hold said lever fr st lengthwise movement relative to aid supporting structure.

16. ln a balancing mechanism, a supporting structure, a lever mounted on said structure for movement about a ransverse axis, means Yfor adjusting said axis lengthwise o1 said lever, an intermediate member adjustable with said axis, and flexible members connecting said intermediate member with said supporting structure and with said lever, to hold said lever against lengthwise movement relative to said supporting` structure.

17. In a balancing mechanism, a supporting structure, a lever mounted on said structure tor move rent about a transverse axis, means tor adjusting said axis lengthwise ot said lever, a rotatable member adjustable with said axis, a plurality ot tlexible members arranged on each side of said rotatable member and each connected at one end therewith, a part ot said llexible members on each side of said rotatable member being connected at their other ends with d lever, and a part being connected with said supporting structure,

18. In a balancing mechanism, a supporting structure, a lever mount fi on said structure tor movement about a airsverse axis, means for adjusting said axi g said lever, a rotatable member adjustable with said axis, plurality ot' flexible members arranged on each side et said rotatable member and each connected at one end therewith, a part of said 'flexible members on each side ot said rod-table member being connected at their other ends with said lever, and a part being connected with said supporting structure, and the points of cont-act king structure, a lever, a carriage mount tivel with said lever and said sentier-ine structure and having their inner ende; cf neeted with said carriag'ge, and mounted on said carriage for taking up or paying out said flexible members said carriage is moved from one position another.

20. In a balancing mechanism, a supi ing structure, a lever, a carriage moua on said structure for adj ustmcnt lengthwise of said lever, a. pivot pin moimted on and movable With said carriage and supporti said lever, a cylindrical member rotataby mounted on said carriage with the appermost portion of its peripheral surface in line with the axis of said lever, a plural of flexible members connected with said cylindrical member and extending across said uppermost part thereoil and in op ositedirections therefrom, a part olf said flexible members on each side ol said cj drical member being monnted with lever, and a part of said lekible memb on each side of said cylindrical member` b ing connected with said sujiporting ture.

2l. In a balancing mechanism, a lever movable about a transve 'se axis, means for adjusting said axis with relation te said lever, and means for automatically maintaining the balance of said lever in j:ich adjusted position of said axis.

22. In a balancing mechanism, a lever movable about a transverse axis, means :for adjusting said axis with relation to said lever, means for holding said lever again-it lengthwise movement without inter'ering With its free pivotal movement, and means for automatically maintaining the balance of said lever in each adjusted position oi': said axis.

23. In a` balancing mechanism, a lever movable about a transverse axis, means for adjusting said axis with rol ion to said lever, a counter-balance connected with said lever, and automatically operated means for adjusting said counterbalanL e to correr-:pond to the adjusted position of said axis.

2st. In a balancing mechanism, a leve.. movable about a transverse axis, means tor adjusting said axis with relation to said lever, a connterbalance connected i h one end of said lever, and means controlled by the adjustment of said axis for adjin.' said counterbalance.

25. In a balancing mechanism, a lever movable about a transverse axis, means 'for adjusting said axis with relation to said lever, a einmterbalance connected with one end of said lever, means comprising a cam for adjusting said counterbalance, and an operative connection between said cam and the adjusting means for said axis.

Q6. In a balancing mechanism, a lever Inova le about a transverse axis, means for adjusting said axis With relatie-n to said lever, a connterbalance connec l e with said lever, nd means acting on said counterbalance independently oif its connection Wit saidlever for adjusting said connterbalance.

27. In a balancing mechanism, a lever movable about a transverse axis, :leans for adjusting said axis with relation to said lever, a counterbalance connected with said lever, and means controlled by the adjustment oia axis for adjusting said counterbalance Without disturbing its connection With said lever.

28. In a 1balancing mechanism, a lever movable about a transverse axis, means tor said axis with relation to said t interfering with the 'tree pivoit ol said lever about said axis,

balancing spring connected with tal i' i a courtier said lef-scr. i means acting on said spring indepen ly of its connection with said l' f automatically regulating the tension thereof.

In a balancing mechanism, a lever movable about transverse axis, means for adjuffztiiig said axis with rel. lever without interfering with vthe tree pivotal movement oin said lever about said axis, a counter balancing spring connected at one end with said lever, means connected with the other end ol' ie spring for regulating the tension thereof, and inea-ns controlled by tbc adjustment of said for actuating said regulating means.

30. In a balancing mechanism, a supporting structure, a lever, cooperating pivot members carried by said .structure and said lever, respe tively, and serving to support said lever on d structure, means for adjusting one of said pivot members rela tively to sid lever, a counterbalance eonnecteel with. said lever, means `for adjusting said counterbalance andan operative connection between the adjusti. g means for said pivot member and the adjusting means for said counter-balance.

3l. In a balancing mechanism, a supporting structure, a lever, cooperating pivot members carried by said structure and said lever, respectively, and serving to support said lever on said structure, means to adjust one of said pivot members relative tosaid lever, means to hold said lever against lengthwise movement relative to said supporting structure, a counterbalance connected with said said s Afor said counterbalance.

82. ln a balancinr mechanism, supporting structure, a

lever, respective s to support said lever on o structure.

means to adjust ff @.51 1 f.' fijne v J- 11j one ol calo. pivot 1- s icntiie to sait ever, means to hold sa'd lever an'ainst lengthwise mo f i: relative to sain. porting stru iure, a counter balancing spring connected With said lever, means acting on said spring indepenf itlj' olf its connection vvith said lever to regulate the tension thereof, e connection betension for said count 83. ln balancing mech ing structure, lever members carried by s lever, respectively, and ser said lever on said one oit said pivot members rel lever, means to hold saidle: I' lengthwise movement "e porting structure, a counter balans connected with said lever, a device said spring to r guA said device comprising l Cetlll, lllfi till tive connection betvveen said cam means for adjusting said pivot member.

3l. In a balancing mechanism, a supporting structure, a. lever, cooperating pivot members carried by said structure and said lever, respectively, and serving to support said lever on said structure, means to adjust one o said pivot members relative to s id lever, means to hold lever nstlengthivise movement relative to said supporting structure, a counter balancing spring connected at one end with sait lever, a tension regulating lever connected vfith the other end olE said spring, a cani acting on said tension r dating lever, and

j, an operative connection betvveen said cam and the means tor adjusting said pivot member.

35. In a balancing meehanis n. a supporting structure, a carriage movabijf mounted on said supporting structure, an actuating device for said carriage, a pivot member mounted on and movable with said carriage, a lever h ving a fiatpivot b aring resting upon said pivot member, means to hold said lever against lengthwise movement, a counterbalance connected With said lever, means for adjusting said counterbalance, and an operative connection between the actuat" device tor said carriage and the adju-.swig means for said eounterbaiance.

86. ln a balancing meeha ing structure, a carriage mo i, supportably mounted on said supporting structure, an actuating device for said carriage, a pivot member mounted on and movable with said carriage, a lever having a 'flat pivot bearing resting uson said pivot member', means to hold said leve a!) tlnvise movement, a counter spring connect-ed vvith said lever, crm acting on said spring independen` connection with said lever to tensi i thereof, and an operan a balancing mechanism, a lever moWlue about transverse axis, means for .dja .ine said axis with relation to said rout interfering With the free pivmovement ot said lever about said axis, a. coi-anterbalance connected with said lever, mea; s for adjusting said counterbalance to correspond to the position of said axis, and an indi Vlator connected with said lever in line with the point ot connection of said counterbalance With said lever.

m In a balancing mechanism, a lever UU. movable about a transverse axis, means for adju., said anis with relation to said l-.ver u iout interfering with the free pivotal move nt of said lever about said axis,

counteroalauce having a pivotal connection with said lever, means tor adjusting said counterbalance to correspond to the position of said axis, an indicator, and an actuating member for said indicator pivotally connected With said lever on an axis coincident with the axis on Which said counterbalance is connected With said lever.

ln a balancing mechanism, a lever held against lengthwise movement and having tree pivotal. movement about its axis, means tor adjusting said axis With relation to said lever, and means automatically operated by said adjusting means tor controlling` the equilibrium ot said lever in all adjusted positions ot said axis.

e0. In a balancing mechanism, a lever having a pivot bearing, means tor adjusting the axis oi said lever lengthwise o't' said lever, means, other than said bearing, for positively retaining said lever in definite lengthwise position, but maintaining at all times its tree pivotal action upon said axis, and means controlled bv t-he adjustment of said axis for maintaining the equilibrium or" said lever at all positions of said axis.

4l. In a balancing mechanism, a lever having a pivot bearing, means for adjusting the axis ot said lever lengthwise o't said lever, means for registering the adjusted posit-ion ot said axis, means, other than said bearing', tor positively retaining said lever in delinite lengthwise position but maintaining at all times its free pivotal action upon said axis, and means for maintaining the equilibrium of said lever at all positions of said axis.

ysaidk axis, and means for controlling said equilibrium maintaining means by thefsaid `axis adjusting means.

43. In a balancing .mechanisim Aa lever having a pivotbearing, means for adjusting 4the axis of said-'lever lengthwise of said lever, means for registering the adjusted position of said axis, means, other than lsaid bearing, aorpositi'vely retaining said lever in definite lengthwise position bnt maintaining yat all timesits free pivotal action upon said axis, means for maintainingthe equilibrium of said lever at all positions of said axis, means for controlling said equilibrium maintaining means by the said axis-adjusting means, and means for coun-terbalancing a load applied to said lever.

44. In a balancing mechanism, a load supporting `lever having a pivot bearing,

means for adjusting the axis of said lever lengthwise of said lever, means for registering the adjusted position of said axis, means, other than said bearing, for positively retaining said lever in definite lengthwise position but maintaining at all times its free pivotal action upon said axis, means for maintaining the equilibrium of said lever at all positions of said axis, and means for counterbalancing a load applied to said lever.

45. In a balancing mechanism, a lever having a pivot bearing, means for adjusting the axis of said lever lengthwise of said lever, means for registering the adjusted position of said axis, means, other than said bearing, for positively retaining said lever in definite lengthwise position but maintaining at all times its free pivotal action upon said axis, means for counterbalancing a load applied to said lever, means for controlling said load counterbalancing means to maintain the equilibrium of said lever at all positions of said axis, and means for actuating said controlling means by the adjustment of said axis.

46. In a balancing mechanism, a load supporting lever, means for adjusting the axis of said lever lengthwise of the lever, means for counterbalancing a load applied to said lever, and means for controlling said load eounterbalancing means to maintain the equilibrium of said lever at all positions of said axis.

47. In a balancing mechanism, a load supporting'lever, means for adjusting the axis of said lever lengthwise-of thelever, means for counter-balancing aload applied to said lever, means for controlling said load Ycounterbalancing meansto maintain theequilibrium of said lever at all ,positions of said axis, and means for indicating va characteristicfofsaid loadiaccording to a unit of computation as established bythe position of said axis.

1418. In al balancing mechanism, a load supportinglever having a pivot bearing, means for adjusting the axis of saidy lever lengthywise of said lever, means, other-thansaid bearing, for positively retaining said lever in definite lengthwise position but maintaining at all times its free pivotal action upon said axis, means for icounterbalancing a load applied to said. lever, and meansfor controlling said load counterbalancing means to maintain the equilibrium-of said lever at all positions of said axis.

49. vIn a balancing mechanism, a load supporting lever, means for adjusting the axis of said lever lengthwise 'of-'the lever, means for registering the adjusted r.position of said axis, and means for counterbalancing a load -applied t0 vsaid lever and for maintaining the equilibrium of said .lever at allpositionsof said axis.

50. In a balancing mechanisin,:a lever, means vfor adjusting the axisr offsaid lever lengthwise offthewlever, means forxoounterbalancing a load applied to; said lever,- means 'for controlling said i load counterba'lancing meansito maintain the equilibrium oisaid Alever vat all, positions. of said axis, and means for actuating said'controlling means.

51. Iln -za balancing vmechanism, ,a slever, means oradjusting the axisf'ofsaiidvlever lengthwise .of .the lever, .means for counterbalancing La 'load applied4 to said lever, means for controlling said -loaid `icountenbarlancing means to maintain the-'equilibrium'.offsaid lever at allvv positions of said axis, and: means for indicating fa' characteristic Yoefsaid: l load according-toa-unit -o computation as estab- 7lisl'iedfb'yithe position of :said axis.

f In a balancing imechanism, `a iloadlsu-pporting lever, fmeans/ for adjusting the: axis `ofV said lever lengthw-ise ofIftl'ie-.leveiymeans itork maintaining thezequilibiiium ofsaid Llever atallf positions of said axis, and meanswor registeringvthe adjusted :position of --said axis.

53. Inca 1 balancing mechanism, railever,

means 'terr-adjusting the axisiof. said lever lengthwise of the g, lever, means `for i maintaining thefzequilibrium vof said ,elever fat all positions oftsaid a-xis,zand meansffor controlling sai'd equilibriummaintaining means -by= 'thesaid' axis adjusting means.

4@In li a kbalancing r mechanism, za rlever, load-supportinglmeans and load-counterbalancing means operatively'connected ,through saidlever,:rneans;-for varying .the degree of gui n'iultiplication of said lever to establish a value for a unit of computation, means for indicating the degree of multiplication ci said lever, and means for maintaining the Zero-balance of said lever at any degree of multiplication.

55. In a balancing mechanism, a lever, load-supporting means and load-counterbalancing means operatively connected through said lever, means for varying the degree of multiplication of said lever to establish a value for a unit oit' computation, means for indicating the degree ot multiplication of said lever, means for maintaining the Zerobalance of said lever at any degree of multiplication, and means for indicating the ratio betiveen a characteristic of the load and a relative unit of computation as established by the degree oi' multiplication of said lever.

G. In a balancing mechanism, a lever, load-supporting means and load counterbalancing means operatively connected through said lever, means for varying the degree of multiplication of said lever to establish a value for a unit of computation, means for multiplication of said lever to establish a value for a unit of computation, means for maintaining the zero-balance of said lever at any degree of multipl'ication, and means for indicating the ratio between a characteristic of the load and a relative unit of computation as established by the degree of multiplication of said lever.

58. In a balancing mechanism, a lever, load-supporting means and load-counterbalancing means each operatively connected to said lever, means for varying the degree of multiplication of said lever to establish a value for a unit of computation, means for maintaining a Zero-balance of said lever at any degree of multiplication, and means for controlling said Zero-balance maintaining means by said multiplication varying means.

59. In a balancing mechanism, a lever, load-supporting means and load-counterbalancing means each operatively connected to said lever, means for varying the degree of multiplication of said lever to establish a value for a unit of con'iputation, means for indicating the degree of multiplication of said lever, 'ieans for maintaining the zerobalance of said lever at any degree of multiplication, and means for controlling said zero-balance maintaining means by said multiplication varying means.

G0. In a balancing mechanism, a lever,

load-supporting means and load-counterbalancing means each operatively connected to said lever, means for varying the degree of multiplication of said lever to establish a value for a unit of computation, means for utilizing said load-counterbalancing means to also maintain the zero-balance ot' said lever at any degree of multiplication, and means for controlling the Zero-balancc maintaining function ot the load-counterbalancing means by said multiplication varying means.

Gl. In a balancing mechanism, a lever, load-supporting means and load counterbalancing means each operatively connected to said lever, means for varying the degree of multiplication of said lever to establish a value for a unit of computation, means for indicating the degree of multiplication of said lever, means for utilizing said loadcounterbalancing means to also maintain the zero-balance of said lever at any degree of multiplication, and means for controlling the zero-balance maintaining function of the load-counterbalancing means by said multiplication varying means.

In testimony whereof, I aiiX my signature hereto.

WILLIAM R. MITTENDORF. 

